Minor error

However, I still don't understand the sentence ;-) What is a "property path string"?

reference/forms/types/options/preferred_choices.rst.inc

@@ -43,7 +43,7 @@ This will "prefer" the "now" and "tomorrow" choices only:
 .. image:: /images/reference/form/choice-example3.png
    :align: center
 
-Finally, if your values are objects, you can also specific a property path string
+Finally, if your values are objects, you can also specify a property path string
 on the object that will return true or false.
 
 The preferred choices are only meaningful when rendering a ``select`` element